I have a "boot" which locks on the rim, and "secure" lug nuts…but you can defeat any security system. The chain around the lift sounds good, I also use a chain around the frame, and "spokes" of the wheel, on the inside, so it is not obvious, but if you have chain cutters or a cut off wheel (both of which I carry in the RV), you can cut off almost any lock in a very short time. (Also locks can be drilled out, or cut with a carbide blade sawzall.)
I had a boat trailer stolen a number of years ago. That is what insurance is for, but you want to make your boat/trailer harder to seal other than the one next to yours! Thiefs take the easiest target.